Microstructure and electrical conductivity of alkaline elements doped apatite-type La10Si6O27 electrolytes
| Autor: | Lei Dai, Yadi Feng, Ling Wang, Yuehua Li, Wei Meng, Zhangxing He |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Process Chemistry and Technology Inorganic chemistry chemistry.chemical_element Sintering 02 engineering and technology Electrolyte Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology Alkali metal Microstructure 01 natural sciences Apatite 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Dielectric spectroscopy chemistry visual_art Materials Chemistry Ceramics and Composites Lanthanum visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Ceramics International. 43:289-295 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2016.09.153 |
| Popis: | Alkali elements doped lanthanum oxyapatites La9.95A0.05Si6O26.95 (A=Li+, Na+, K+) are synthesized successfully by the solid state reaction. The structure, morphology and composition of La9.95A0.05Si6O26.95 electrolytes are characterized by XRD, SEM and EDS, respectively. The electrical properties of La9.95A0.05Si6O26.95 ceramics are investigated by electrochemical impedance spectroscopy (EIS). The results show that all the La9.95A0.05Si6O27−δ electrolytes consist of a single hexagonal apatite structure without impurity. The sinterability of apatite electrolytes is improved by the alkali elements doping and the densification sintering of the electrolytes can be achieved at 1550 °C. Among the alkali element doped samples, La9.95K0.05Si6O26.95 exhibits the lowest activation energy for the electrical conduction and the highest conductivity of 1.12×10−2 S cm−1 at 800 °C. |
| Databáze: | OpenAIRE |
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